The Lama arrived properly trimmed but we had to open and adjust the transmitter to trim the rudder control(or else have to continually make manual adjustments to keep it from turning. It is very heavy and much more care must be taken when powering down the engine or it will hit the floor hard. With a flight time of 10+ minutes, I look forward to increasing my skill level with this model, next helicopter will likely be a single rotor outdoor model.